Tests and package name updated

Runtime/QR/FonepayQRGenerator.cs

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+using System.Collections;
+using QRCoder;
+using UnityEngine;
+
+namespace Darkmatter.Fonepay
+{
+    /// <summary>
+    /// QR code generator backed by QRCoder (MIT). See Plugins/QRCoder-LICENSE.txt.
+    /// </summary>
+    public static class FonepayQRGenerator
+    {
+        public enum EccLevel { L, M, Q, H }
+
+        public static Texture2D GenerateTexture(string text, int pixelSize = 10,
+            EccLevel ecc = EccLevel.M, Color? darkColor = null, Color? lightColor = null)
+        {
+            bool[,] matrix = GenerateMatrix(text, ecc);
+            int size = matrix.GetLength(0);
+            int texSize = size * pixelSize;
+
+            var tex = new Texture2D(texSize, texSize, TextureFormat.RGBA32, false)
+            {
+                filterMode = FilterMode.Point,
+                wrapMode = TextureWrapMode.Clamp
+            };
+
+            Color dark = darkColor ?? Color.black;
+            Color light = lightColor ?? Color.white;
+
+            var pixels = new Color[texSize * texSize];
+            for (int row = 0; row < size; row++)
+            for (int col = 0; col < size; col++)
+            {
+                Color c = matrix[row, col] ? dark : light;
+                int yBase = (size - 1 - row) * pixelSize;
+                int xBase = col * pixelSize;
+                for (int py = 0; py < pixelSize; py++)
+                {
+                    int rowStart = (yBase + py) * texSize + xBase;
+                    for (int px = 0; px < pixelSize; px++)
+                        pixels[rowStart + px] = c;
+                }
+            }
+            tex.SetPixels(pixels);
+            tex.Apply();
+            return tex;
+        }
+
+        public static Sprite GenerateSprite(string text, int pixelSize = 10,
+            EccLevel ecc = EccLevel.M, Color? darkColor = null, Color? lightColor = null,
+            float pixelsPerUnit = 100f)
+        {
+            var tex = GenerateTexture(text, pixelSize, ecc, darkColor, lightColor);
+            var sprite = Sprite.Create(tex,
+                new Rect(0, 0, tex.width, tex.height),
+                new Vector2(0.5f, 0.5f),
+                pixelsPerUnit,
+                0, SpriteMeshType.FullRect);
+            sprite.name = "FonepayQR";
+            return sprite;
+        }
+
+        public static bool[,] GenerateMatrix(string text, EccLevel ecc = EccLevel.M)
+        {
+            if (string.IsNullOrEmpty(text))
+                throw new System.ArgumentException("QR text must be non-empty", nameof(text));
+
+            using var data = new QRCodeGenerator().CreateQrCode(text, MapEcc(ecc), forceUtf8: true);
+            int size = data.ModuleMatrix.Count;
+            var matrix = new bool[size, size];
+            for (int row = 0; row < size; row++)
+            {
+                BitArray bits = data.ModuleMatrix[row];
+                for (int col = 0; col < size; col++)
+                    matrix[row, col] = bits[col];
+            }
+            return matrix;
+        }
+
+        static QRCodeGenerator.ECCLevel MapEcc(EccLevel e) => e switch
+        {
+            EccLevel.L => QRCodeGenerator.ECCLevel.L,
+            EccLevel.M => QRCodeGenerator.ECCLevel.M,
+            EccLevel.Q => QRCodeGenerator.ECCLevel.Q,
+            EccLevel.H => QRCodeGenerator.ECCLevel.H,
+            _ => QRCodeGenerator.ECCLevel.M
+        };
+    }
+}

Runtime/QR/FonepayQRGenerator.cs.meta

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+fileFormatVersion: 2
+guid: 926e00b59f70b418bbf937c11a1c8494